I am setting up a 20 gallon QT and needed some RO/DI water. Instead of running my own Spectrapure RO/DI unit at miserable and (s)low 40 PSI I got 10 gallons of water from Ellis Aquatics. I measured the water with a TDS meter (yes, I am THAT guy) and let me tell you, the store has the cleanest water I've purchased from LFS by far. TDS reading was 0 at the lowest and 01 highest. Couple of other stores I bought water from TDS reading is usually between 15 and 20 PPM.
So next time you need cleanest water for your reef tank you know of at least one store that has clean water. Here are two pics, the first one with 0 TDS is crappy.
So next time you need cleanest water for your reef tank you know of at least one store that has clean water. Here are two pics, the first one with 0 TDS is crappy.